巧用等效法求电功率极值

介绍了串联电路的等效、 并联电路的等效、 含理想变压器电路的等效和一般的非纯电阻电路的等效方 法来求解电功率极值问题     

巧用“等效电源”解决物理问题

阐述了如何将一段两端有源网络等效为一个电源,并具体介绍了四种类型的等效电源及其巧妙用法.     

再谈一道理想变压器动态分析的经典错题

理想变压器是高考的高频考点,所涉及的知识点相对简单,学生往往能列出式子但求解不出来.故笔者介绍两种方法即等效电阻法和等效电源法,帮助学生跳过繁琐的数学推导和计算,快速解决问题.     

四端星-网电阻网络的等效变换及其应用

导出了四端星-网(全网)电阻网络的等效变换式,并应用它求出几例特殊复杂电阻网络(非串非并电路)的等效电阻.     

广义相对论简介之一：广义相对论的基本原理

大大学物理的层次上介绍广义相对论的等效原理和广义相对性原理，讨论局域惯性系，时空弯曲和引力几何化。     

推求双原子分子谱项

本文讨论子双原子分子等效组态和非等效组太光谱的推求方法。     

用等效替代法解决物理问题

等效替代是物理学的重要方法之一，如力的合成与分解是力的等效替代，运动的合成和分解是不同参照系中运动的等效变换，在变速运动中的平均速度是用一个数值为平均速度的匀速直线运动来替代一段时间内的变速运动，在电学中的等效电路，交流电中的有效值等都     

在普物力学中开一个通往广义相对论的窗口：《新概念物理教程—力学》？…

介绍作者在《新概念物理教程－力学》中处理广义相对论材料的一些思考，着重分析了浅显讲解广义相对论时容易出现的某些错误。     

在普物力学中开一个通往广义相对论的窗口──《新概念物理教程──力学》中对广义相对论内容的处理

介绍作者在《新概念物理教程──力学》中处理广义相对论材料的一些思考，着重分析了浅显讲解广义相对论时容易出现的某些错误．     

等效替换物理思想解决刚体定轴转动问题

用等效替换的物理思想深刻理解和直观快速解决一类典型刚体定轴转动问题,并推广至刚体平面运动的非定轴转动问题.定轴转动问题的标准解法是隔离物体做受力分析,列方程组然后求解.但标准解法步骤繁复容易出错,另外解的过程主要依靠数学推导求解方程组,不利于理解问题的物理本质和意义.而使用等效替换思想解决这类问题时,把直线运动和定轴转...     

Classical Versus Quantum Equivalence Between Sine-Gordon,Liouville and Other Solitons

In this work we present a mapping between the classical solutions of the sine-Gordon, Liouville, ⁴ and other kinks in 1+1 dimensions. This is done by using an invariant quantity which relates the models. It is easily shown that this procedure is equivalent to that used to get the so called deformed solitons, as proposed recently by Bazeia et al. [Phys. Rev. D. 66 (2002) 101701(R)]. The classical equivalence is explored in order to relate the solutions of the corresponding models and, as a consequence, try to get new information about them. We discuss also the difficulties and consequences which appear when one tries to extend the deformation in order to take into account the quantum version of the models.     

Effect of Earth's Rotation on the Trajectories of Free-Fall Bodies in Equivalence Principle Experiment

Owing to Earth's rotation a free-fall body would move in an elliptical orbit rather than along a straight line forward to the center of the Earth. In this paper on the basis of the theory for spin-spin coupling between macroscopic rotating bodies we study violation of the equivalence principle from long-distance free-fall experiments by means of a rotating ball and a non-rotating shell. For the free-fall time of 40 s, the difference between the orbits of the two free-fall bodies is of the order of 10-9 cm which could be detected by an SQUID magnetometer because such a magnetometer can be used to measure displacements as small as 10-13 cm.     

A Lorentz-Poincaré Type Interpretation of the Weak Equivalence Principle

The validity of the Weak Equivalence Principle relative to a local inertial frame is detailed in a scalar-vector gravitation model with Lorentz-Poincaré type interpretation. Given the previously established first Post-Newtonian concordance of dynamics with General Relativity, the principle is to this order compatible with GRT. The gravitationally modified Lorentz transformations, on which the observations in physical coordinates depend, are shown to provide a physical interpretation of parallel transport. A development of ‘geodesic’ deviation in terms of the present model is given as well. PACS subject classifications. 04.20.-q, 04.50.+h     

An elementary notion of gauge equivalence

An elementary notion of gauge equivalence is introduced that does not require any Lagrangian or Hamiltonian apparatus. It is shown that in the special case of theories, such as general relativity, whose symmetries can be identified with spacetime diffeomorphisms this elementary notion has many of the same features as the usual notion. In particular, it performs well in the presence of asymptotic boundary conditions.     

七种系综的经典分布及其热力学等价性

给出了只作膨胀功的单元系七种系综的经典统计分布形式，并举例说明其热力学等价性。     

Die Doppelte Magnetisc HE Nichtöquivalenz in DEM Diisopropylmercaptal Des 2-Phenylpropanals

Double magnetic non equivalence in the diisopropyl mercaptale of 2-phenlpropanal is observed.     

Diastereotope Methylenprotonen und Methylgruppen in 2-Substituierten 1,6-Methano [10] Annulenen

The double magnetic non equivalence of the diastereotopic methylene protons resp. geminal methyl groups of 2-substituted 1,6-methano [10]annulenes were observed in five solvents. It was found that Δν_AB for one of the two methylene groups were much smaller than Δν_{A ‘B’} for the other and that Δν_A‘B’ was much more solvent dependent than Δν_AB. Δν_{A “B”} for the bridge protons varied very little with the solvent used.     

两种χ2形式的等价性

通过矩阵计算证明了两种χ2形式的等价性,同时讨论了最小化估计值的有偏性. 利用简化的R值测量定量地检验了等价性的结论.